org.springframework.boot
     	
     
      spring-boot-starter-mail
     /dependency>
    

spring:  mail:    username: 2437766749@qq.com    password: 邮箱校验码    host: smtp.qq.com    properties:      mail:        smtp:          ssl:            enable: true

package com.shi.snyc;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.mail.SimpleMailMessage;import org.springframework.mail.javamail.JavaMailSenderImpl;import org.springframework.mail.javamail.MimeMessageHelper;import org.springframework.test.context.junit4.SpringRunner;import javax.mail.internet.MimeMessage;import java.io.File;@RunWith(SpringRunner.class)@SpringBootTestpublic class SnycApplicationTests {	@Autowired	JavaMailSenderImpl mailSender;	@Test	public void contextLoads() {		//简单格式传输邮件		SimpleMailMessage message = new SimpleMailMessage();		message.setSubject("设置标题");		message.setText("设置内容");		message.setTo("307137783@qq.com");		message.setFrom("2437766749@qq.com");		mailSender.send(message);	}	@Test	public void test2() throws  Exception{		//创建一个复杂的消息邮件		MimeMessage mimeMessage = mailSender.createMimeMessage();		MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);		helper.setSubject("设置标题");		helper.setText("设置内容",true);//使用html		helper.setTo("307137783@qq.com");		helper.setFrom("2437766749@qq.com");		helper.addAttachment("1.jpg",new File("C:\\Users\\low\\Desktop\\1.png"));		mailSender.send(mimeMessage);	}}